NAD M4 Specifications

Masters Series – M4 Analogue/Digital Tuner
The NAD M4 is the most advanced tuner ever developed by NAD. Matching
the style, build quality and performance of our award winning Masters
Series components, the M4 performance is at the outer limits of radio
broadcast quality. Combining a highly sensitive FM/AM tuning section
with the latest digital broadcast technology, the M4 extracts maximum
sound quality from every radio format.
PERFORMANCE
Whether listening to an analogue broadcast on the FM or AM bands, or
a digital broadcast, the M4 offers the highest levels of interference free
reception. In the FM Tuner section a shielded multi-stage MOSFET RF
features tuning in 0.0125 MHz steps for accurate tuning and the ability to
compensate for multi-path contaminated signals. The M4 features a crystal
controlled synthesized phase lock loop with IF counter for accurate VCO
tuning, and a two stage loop filter for PLL output. In addition, the oscillator
to synthesizer stage is buffered to keep spurious responses extremely well
suppressed. Excellent sensitivity combined with high overload margins
result in good station pulling power and clear reception, even in urban
areas. Excellent selectivity and capture ratio allow clear reception of all
stations on the often crowded FM dial. The IF stage features three ceramic
filter stages for low distortion and excellent channel separation. Sound
quality is not overlooked, with a double tuned FM detector for low distortion
and frequency response correction and MPX filter to give improved audio
frequency response without sacrificing MPX rejection.
AM performance, while never able to achieve the low noise and distortion
of FM broadcasting, is never-the-less highly sensitive with noise levels well
suppressed. More importantly, it sounds open and dynamic.
Digital Audio Broadcast combines noise-free performance with an
unprecedented selection of stations. Since DAB uses audio compression
(MP2) to maximize station selection, it is critical that the decoding and
conversion to analog be as accurate as possible. Operating at a 48kHz
sampling rate and 24 bit word length, DAB broadcasts have low distortion
and wide dynamic range. The M4 excels at extracting the maximum sound
quality from digital broadcast using premium quality devices and advance
circuit design in the digital and analogue stage.
SIMPLICITY
By combining all broadcast formats in one elegant component the M4 is
the perfect way to add radio to a Masters Series stereo or surround sound
system. Auto tuning finds all the stations available in your locale and the
station preset memory allows you to save your favourites for fast and easy
recall. These can be accessed from the front panel or via the supplied IR
remote control. Additionally, an RS-232 port, IR input and 12V trigger allow
- 40 Preset Station Memory
- RDS function displays Station ID and Radio
Text from broadcast compliant stations
- FM Mute eliminates inter-station tuning noise
- FM Blend reduces noise of distant or
"fringe" stations by reducing high frequency
separation
- High sensitivity AM tuner
- Supports DAB Band III and L Band (230V
version)
- XM Ready input for external XM Satellite
module (120V version)
- Audiophile quality Burr Brown Digital to
Analogue converters
- Audio specific Burr Brown OP Amps
- Separate power supplies for Digital Control
and Audio stages
- RS-232 port interfaces with external control
systems (Crestron and AMX certified)
- Rear panel IR Input allows easy interface to
external IR sensors
- NAD Build Artistry construction
- M4 Remote Control